Testing a Base Station

2. The method of claim 1, comprising determining the difference in the frequencies and/or the difference in the timings between the two wireless carriers during error vector magnitude testing.

3. The method of claim 2, wherein the difference in the frequencies and/or the difference in the timings is obtained in a Pre-FFT minimization process of the error vector magnitude testing.

4. The method of claim 1, comprising testing wireless carriers according to 3GPP 5G New Radio and 3GPP 4G Long Term Evolution standards.

5. The method of claim 1, comprising computing a relative carrier frequency error and a relative carrier timing error between the two wireless carriers of different carrier technologies.

6. The method of claim 5, wherein different relative carrier frequency and timing error limits are used for different sub-carrier spacings, the method comprising applying the strictest of the limits to mixed sub-carrier spacings between the two wireless carriers of different carrier technologies.

7. The method of claim 5, comprising computing absolute differences between the carrier frequency errors and carrier timing errors of the two wireless carriers.

8. The method of claim 1, further comprising setting up communications between a testing device and the base station for the conformance testing, the setting up comprising applying a frequency shift to a wireless carrier generated by the testing device and using the frequency shifted wireless carrier for the setup.

10. The apparatus of claim 9, configured to determine the difference in the frequencies and/or the difference in the timings between the two wireless carriers during error vector magnitude testing.

11. The apparatus of claim 10, configured to determine the difference in the frequencies and/or the difference in the timings in a Pre-FFT minimization process of the error vector magnitude testing.

12. The apparatus of claim 9, configured to test wireless carriers according to 3GPP 5G New Radio and 3GPP 4G Long Term Evolution standards.

13. The apparatus of claim 9, configured to compute a relative carrier frequency error and a relative carrier timing error between the two wireless carriers of different carrier technologies.

14. The apparatus of claim 13, wherein different relative carrier frequency and timing error limits are used for different sub-carrier spacings, and the strictest limits are applied to mixed sub-carrier spacings between the two wireless carriers of different carrier technologies.

15. The apparatus of claim 13, configured to compute absolute differences between the carrier frequency errors and carrier timing errors of the two wireless carriers.

16. The apparatus of claim 9, further configured to set up communications between the testing device and the base station for the conformance testing, the setting up comprising applying a frequency shift to a wireless carrier generated by the testing device and using the frequency shifted wireless carrier for the setup.

17. The apparatus of claim 16, configured to applying a 7.5 kHz frequency shift to the wireless carrier.

18. The apparatus of claim 16, configured to apply the frequency shift to a 3GPP 5G New Radio uplink carrier.

19. The apparatus of claim 9, further configured to cause adjustment of frequency and/or timing of at least one of the wireless carriers based on the testing.

20. The apparatus of claim 19, configured to provide an adjustment loop with the base station such that the frequency and/or timing of at least one of the wireless carriers is automatically adjusted based on results of the testing.